The changes of CD4^＋CD25^＋ regulatory T cells （CD4^＋CD25^＋ Treg） and Foxp3 mRNA in peripheral blood mononuclear cells （PBMCs） from patients with asthma were investigated in order to elucidate the possible role...The changes of CD4^＋CD25^＋ regulatory T cells （CD4^＋CD25^＋ Treg） and Foxp3 mRNA in peripheral blood mononuclear cells （PBMCs） from patients with asthma were investigated in order to elucidate the possible roles of CD4^＋CD25^＋ Treg in the development of asthma. The peripheral blood samples were collected from 29 healthy controls （normal control group） and 78 patients with asthma which included 30 patients in exacerbation group, 25 patients in persistent group, and 23 patients in remission group. By using flow cytometry and RT-PCR, the CD4^＋CD25^＋ Treg ratio and Foxp3 mRNA in PBMCs were detected. The CD4^＋CD25^＋ Treg ratio and Foxp3 mRNA in PBMCs of exacerbation and persistent groups were lower than that of remission and normal control groups （P〈0.05）. Although the CD4^＋CD25^＋ Treg ratio and Foxp3 mRNA of remission group were also lower than that of normal control group, there was no significant difference between them （P〉0.05）. As compared with persistent group, exacerbation group had lower CD4^＋CD25^＋ Treg ratio and Foxp3 mRNA （P〈0.05）. It was indicated that the decrease of CD4^＋CD25^＋ Treg ratio and its function in PBMCs may be responsible for pathogenesis of asthma.展开更多
Immunotherapy may be used for the treatment of glioblastoma multiforme; however, the induced immune response is inadequate when either T cells or dendritic cells are used alone. In this study we established a novel va...Immunotherapy may be used for the treatment of glioblastoma multiforme; however, the induced immune response is inadequate when either T cells or dendritic cells are used alone. In this study we established a novel vaccine procedure in rats, using dendritic cells pulsed with C6 tumor cell lysates in combination with adoptive transfer of T lymphocytes from syngenic donors. On day 21 after tumor inoculation, all the rats were sacrificed, the brains were harvested for calculation of glioma volume, cytolytic T lymphocyte responses were measured by cytotoxic assay, and the frequency of regulatory T lymphocytes （CD4＋CD25~FOXP3~） in the peripheral blood was investigated by flow cytometric analysis. The survival rate of rats bearing C6 glioma was observed. Results showed that the co-immunization strategy had significant anti-tumor potential against the pre-established C6 glioma, and induced a strong cytolytic T lymphocyte response in rats. The frequency of peripheral blood CD4＊CD25＊FOXP3＊ regulatory T lymphocytes was significantly decreased following the combination therapy, and the rats survived for a longer period. Experimental findings indicate that the combined immunotherapy of glioma cell lysate-pulsed dendritic cell vaccination following adoptive transfer of T cells can effectively inhibit the growth of gliomas in rats, boost anti-tumor immunity and produce a sustained immune response while avoiding the accumulation of CD4＋CD25＋FOXP3＋ regulatory r lymphocytes.展开更多
Objective: To investigate the expression of both thymic regulatory T cells (CD4+CD25+Foxp3+cells, Treg) and thymic stromal lymphopoietin (TSLP) in thymomas accompanying myasthenia gravis. Methods: We used immunohistoc...Objective: To investigate the expression of both thymic regulatory T cells (CD4+CD25+Foxp3+cells, Treg) and thymic stromal lymphopoietin (TSLP) in thymomas accompanying myasthenia gravis. Methods: We used immunohistochemistry and real-time reverse trancription polymerase chain reaction (real-time RT-PCR) techniques to determine Foxp3+ Treg counts and the expression levels of Foxp3 mRNA and TSLP mRNA in thymomas of 23 MG patients and thymuses of 4 healthy controls. Results: The CD4+ Foxp3+ nTreg (natural regulatory T cells) counts in thymomas were significantly lower than those in normal thymuses (P<0.01), and the expression levels of Foxp3 mRNA and TSLP mRNA were also lower in thymomas(P<0.01). Among the thymoma types, type B1 thymoma had the highest Foxp3+ nTreg count and standard values of Foxp3 mRNA and TSLP mRNA. There was a strong positive correlation between the mRNA transcriptional levels of Foxp3 and TSLP. Conclusion: The insufficient expression of Foxp3 in thymoma, which may be caused by decreased transcription of TSLP, may result in the reduction of Tregs and cause autoimmune disorders.展开更多
Glatiramer acetate （GA） is an immunomodulatory peptide drug used to treat multiple sclerosis. Its treatment effect has been expanded to other autoimmune conditions such as uveoretinitis, inflammatory bowel disease, ...Glatiramer acetate （GA） is an immunomodulatory peptide drug used to treat multiple sclerosis. Its treatment effect has been expanded to other autoimmune conditions such as uveoretinitis, inflammatory bowel disease, graft re- jection and hepatic fibrosis. Here, we report that GA was effective in altering the clinical course of diabetes in cyclo- phosphamide （CY）-potentiated non-obese diabetic （CY-NOD） mice. Treatment with GA significantly reduced the dia- betic rate in the mice and ameliorated insulitis, which coincided with increased CD4＋CD25＋Foxp3＋ T cell response in treated mice. GA treatment led to increased expression of transcription factor Foxp3 and elevated production of interleukin-4 （IL-4） both in vivo and in vitro. It was evident that the effect of GA on up-regulation of Foxp3 was me- diated partially through IL-4. IL-4 was found to maintain Foxp3 expression and regulatory function of CD4＋CD25＋ regulatory T cells （Tregs）. This study provides new evidence that GA has treatment potential for type 1 diabetes through the induction of Tregs and that increased IL-4 production is partially responsible for the enhanced Treg＇s function in GA treatment.展开更多
目的探讨宫颈癌患者外周血CD4^+CD25^+Foxp3^+调节性T淋巴细胞(regulatory T cells,Treg)、T淋巴细胞亚群以及血清IL-10、TGF-β1、TGF-β2细胞因子的表达及其临床意义。方法选取32例宫颈癌患者和24位健康体检者为研究对象,采用流式细...目的探讨宫颈癌患者外周血CD4^+CD25^+Foxp3^+调节性T淋巴细胞(regulatory T cells,Treg)、T淋巴细胞亚群以及血清IL-10、TGF-β1、TGF-β2细胞因子的表达及其临床意义。方法选取32例宫颈癌患者和24位健康体检者为研究对象,采用流式细胞术检测受试者外周血中CD4^+CD25^+Foxp3^+Treg占CD4^+T淋巴细胞的比例、T淋巴细胞亚群细胞比例;采用ELISA方法检测血清中细胞因子IL-10、TGF-β1、TGF-β2的含量。结果与健康对照组相比,宫颈癌组外周血中CD4^+CD25^+Foxp3^+Treg占CD4^+T淋巴细胞的比值明显增高,差异有统计学意义(P<0.01),T淋巴细胞亚群(CD3^+、CD4^+、CD8^+、CD4^+/CD8^+、CD19^+)比例差异无统计学意义(P>0.05),血清IL-10含量明显增高,TGF-β2含量明显降低,差异有统计学意义(P<0.01),TGF-β1的含量差异无统计学意义(P>0.05);宫颈癌组手术后、化疗后CD4^+CD25^+Foxp3^+Treg占CD4^+T淋巴细胞的比例,血清IL-10、TGF-β1、TGF-β2含量均明显降低,差异有统计学意义(P<0.01),CD4^+CD25^+Foxp3^+Treg与TGF-β1之间存在正相关(r=0.673,P<0.01)。结论宫颈癌患者CD4^+CD25^+Foxp3^+Treg占CD4^+T淋巴细胞的比值增高,且与TGF-β1含量呈正相关,可能在宫颈癌的肿瘤发生发展及肿瘤免疫逃逸中起着重要作用。展开更多
目的:探讨HBV感染者外周血CD4^+CD25^+Fox- p3^+调节性T细胞水平与HBV感染后疾病进程的相关性.方法:HBV感染者136名及健康对照40名,应用流式细胞仪胞内染色技术检测外周血CD4^+CD25^+Foxp3^+调节性T细胞表达,结合HBV感染者临床情况进行...目的:探讨HBV感染者外周血CD4^+CD25^+Fox- p3^+调节性T细胞水平与HBV感染后疾病进程的相关性.方法:HBV感染者136名及健康对照40名,应用流式细胞仪胞内染色技术检测外周血CD4^+CD25^+Foxp3^+调节性T细胞表达,结合HBV感染者临床情况进行分析.结果:HBV感染者外周血CD4^+CD25^+Foxp3^+调节性T细胞表达率较健康对照组显著增高(7.48%±1.03% vs 3.58%±0.71%,P<0.01);慢性乙肝组与慢性重型乙肝组相比,外周血CD4^+CD25^+Foxp3^+T调节细胞的表达率有明显差异(6.55%±1.26% vs 8.65%±2.58%,P<0.05);HBV病毒载量的对数值与外周血CD4^+CD25^+Foxp3^+T调节细胞的表达率之间存在正相关(r=0.332,P<0.01).结论:HBV感染者外周血CD4^+CD25^+Foxp3^+调节性T细胞水平与疾病进展明显相关.展开更多
基金This project was supported by a program of Science Project of Hubei Province (No.2003AA301C10).
文摘The changes of CD4^＋CD25^＋ regulatory T cells （CD4^＋CD25^＋ Treg） and Foxp3 mRNA in peripheral blood mononuclear cells （PBMCs） from patients with asthma were investigated in order to elucidate the possible roles of CD4^＋CD25^＋ Treg in the development of asthma. The peripheral blood samples were collected from 29 healthy controls （normal control group） and 78 patients with asthma which included 30 patients in exacerbation group, 25 patients in persistent group, and 23 patients in remission group. By using flow cytometry and RT-PCR, the CD4^＋CD25^＋ Treg ratio and Foxp3 mRNA in PBMCs were detected. The CD4^＋CD25^＋ Treg ratio and Foxp3 mRNA in PBMCs of exacerbation and persistent groups were lower than that of remission and normal control groups （P〈0.05）. Although the CD4^＋CD25^＋ Treg ratio and Foxp3 mRNA of remission group were also lower than that of normal control group, there was no significant difference between them （P〉0.05）. As compared with persistent group, exacerbation group had lower CD4^＋CD25^＋ Treg ratio and Foxp3 mRNA （P〈0.05）. It was indicated that the decrease of CD4^＋CD25^＋ Treg ratio and its function in PBMCs may be responsible for pathogenesis of asthma.
基金supported by the grant from the National Natural Science Foundation of China,No.30872647
文摘Immunotherapy may be used for the treatment of glioblastoma multiforme; however, the induced immune response is inadequate when either T cells or dendritic cells are used alone. In this study we established a novel vaccine procedure in rats, using dendritic cells pulsed with C6 tumor cell lysates in combination with adoptive transfer of T lymphocytes from syngenic donors. On day 21 after tumor inoculation, all the rats were sacrificed, the brains were harvested for calculation of glioma volume, cytolytic T lymphocyte responses were measured by cytotoxic assay, and the frequency of regulatory T lymphocytes （CD4＋CD25~FOXP3~） in the peripheral blood was investigated by flow cytometric analysis. The survival rate of rats bearing C6 glioma was observed. Results showed that the co-immunization strategy had significant anti-tumor potential against the pre-established C6 glioma, and induced a strong cytolytic T lymphocyte response in rats. The frequency of peripheral blood CD4＊CD25＊FOXP3＊ regulatory T lymphocytes was significantly decreased following the combination therapy, and the rats survived for a longer period. Experimental findings indicate that the combined immunotherapy of glioma cell lysate-pulsed dendritic cell vaccination following adoptive transfer of T cells can effectively inhibit the growth of gliomas in rats, boost anti-tumor immunity and produce a sustained immune response while avoiding the accumulation of CD4＋CD25＋FOXP3＋ regulatory r lymphocytes.
文摘Objective: To investigate the expression of both thymic regulatory T cells (CD4+CD25+Foxp3+cells, Treg) and thymic stromal lymphopoietin (TSLP) in thymomas accompanying myasthenia gravis. Methods: We used immunohistochemistry and real-time reverse trancription polymerase chain reaction (real-time RT-PCR) techniques to determine Foxp3+ Treg counts and the expression levels of Foxp3 mRNA and TSLP mRNA in thymomas of 23 MG patients and thymuses of 4 healthy controls. Results: The CD4+ Foxp3+ nTreg (natural regulatory T cells) counts in thymomas were significantly lower than those in normal thymuses (P<0.01), and the expression levels of Foxp3 mRNA and TSLP mRNA were also lower in thymomas(P<0.01). Among the thymoma types, type B1 thymoma had the highest Foxp3+ nTreg count and standard values of Foxp3 mRNA and TSLP mRNA. There was a strong positive correlation between the mRNA transcriptional levels of Foxp3 and TSLP. Conclusion: The insufficient expression of Foxp3 in thymoma, which may be caused by decreased transcription of TSLP, may result in the reduction of Tregs and cause autoimmune disorders.
文摘Glatiramer acetate （GA） is an immunomodulatory peptide drug used to treat multiple sclerosis. Its treatment effect has been expanded to other autoimmune conditions such as uveoretinitis, inflammatory bowel disease, graft re- jection and hepatic fibrosis. Here, we report that GA was effective in altering the clinical course of diabetes in cyclo- phosphamide （CY）-potentiated non-obese diabetic （CY-NOD） mice. Treatment with GA significantly reduced the dia- betic rate in the mice and ameliorated insulitis, which coincided with increased CD4＋CD25＋Foxp3＋ T cell response in treated mice. GA treatment led to increased expression of transcription factor Foxp3 and elevated production of interleukin-4 （IL-4） both in vivo and in vitro. It was evident that the effect of GA on up-regulation of Foxp3 was me- diated partially through IL-4. IL-4 was found to maintain Foxp3 expression and regulatory function of CD4＋CD25＋ regulatory T cells （Tregs）. This study provides new evidence that GA has treatment potential for type 1 diabetes through the induction of Tregs and that increased IL-4 production is partially responsible for the enhanced Treg＇s function in GA treatment.
文摘目的探讨宫颈癌患者外周血CD4^+CD25^+Foxp3^+调节性T淋巴细胞(regulatory T cells,Treg)、T淋巴细胞亚群以及血清IL-10、TGF-β1、TGF-β2细胞因子的表达及其临床意义。方法选取32例宫颈癌患者和24位健康体检者为研究对象,采用流式细胞术检测受试者外周血中CD4^+CD25^+Foxp3^+Treg占CD4^+T淋巴细胞的比例、T淋巴细胞亚群细胞比例;采用ELISA方法检测血清中细胞因子IL-10、TGF-β1、TGF-β2的含量。结果与健康对照组相比,宫颈癌组外周血中CD4^+CD25^+Foxp3^+Treg占CD4^+T淋巴细胞的比值明显增高,差异有统计学意义(P<0.01),T淋巴细胞亚群(CD3^+、CD4^+、CD8^+、CD4^+/CD8^+、CD19^+)比例差异无统计学意义(P>0.05),血清IL-10含量明显增高,TGF-β2含量明显降低,差异有统计学意义(P<0.01),TGF-β1的含量差异无统计学意义(P>0.05);宫颈癌组手术后、化疗后CD4^+CD25^+Foxp3^+Treg占CD4^+T淋巴细胞的比例,血清IL-10、TGF-β1、TGF-β2含量均明显降低,差异有统计学意义(P<0.01),CD4^+CD25^+Foxp3^+Treg与TGF-β1之间存在正相关(r=0.673,P<0.01)。结论宫颈癌患者CD4^+CD25^+Foxp3^+Treg占CD4^+T淋巴细胞的比值增高,且与TGF-β1含量呈正相关,可能在宫颈癌的肿瘤发生发展及肿瘤免疫逃逸中起着重要作用。
文摘目的:探讨HBV感染者外周血CD4^+CD25^+Fox- p3^+调节性T细胞水平与HBV感染后疾病进程的相关性.方法:HBV感染者136名及健康对照40名,应用流式细胞仪胞内染色技术检测外周血CD4^+CD25^+Foxp3^+调节性T细胞表达,结合HBV感染者临床情况进行分析.结果:HBV感染者外周血CD4^+CD25^+Foxp3^+调节性T细胞表达率较健康对照组显著增高(7.48%±1.03% vs 3.58%±0.71%,P<0.01);慢性乙肝组与慢性重型乙肝组相比,外周血CD4^+CD25^+Foxp3^+T调节细胞的表达率有明显差异(6.55%±1.26% vs 8.65%±2.58%,P<0.05);HBV病毒载量的对数值与外周血CD4^+CD25^+Foxp3^+T调节细胞的表达率之间存在正相关(r=0.332,P<0.01).结论:HBV感染者外周血CD4^+CD25^+Foxp3^+调节性T细胞水平与疾病进展明显相关.
